Loading speaker stands with?

Note: I also decouple my standmount speakers from the (weighted) stands using IsoAcoustic or StackAudio pucks for the best results. The pucks should be between the bottom of the speakers and the top of the stands, not underneath the stands.

If cost is not a consideration, go for tungsten shot instead of lead.

@glennewdick 

"I use cleaned and dried sand from a pet store, usually used in fish tanks. if you prefer crushed rock, they have that too. lead is dead as they say, if it’s not encapsulated don't use it."

To elaborate on this, I would go with epoxy coated #2-3 aquarium gravel any color you want. It's clean, dust free, can be purchased in a number of pre-packaged quantities, is probably more economical and as good as anything anyone else has mentioned in this thread.

Actually, the most economical way to go depending on where you live is 1/4 inch pea stone. I pay $40 a ton for that stuff. Hmm, maybe I should be washing it and bagging it up...

I have about 6 pairs of stands and used sand to fill them. The bagged sand at Home Depot, or a trip to my local gravel yard. Very inexpensive and effective.